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From bbaa6142eadf229334436fdbf51aa65bb819f771 Mon Sep 17 00:00:00 2001
From: Peter Oh <peter.oh@bowerswilkins.com>
Date: Tue, 29 May 2018 14:39:15 -0700
Subject: [PATCH 11/18] mesh: Allow DFS channels to be selected if dfs is
 enabled

Note: DFS is assumed to be usable if a country code has been set

Signed-off-by: Benjamin Berg <benjamin@sipsolutions.net>
Signed-off-by: Peter Oh <peter.oh@bowerswilkins.com>
---
 wpa_supplicant/wpa_supplicant.c | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)

--- a/wpa_supplicant/wpa_supplicant.c
+++ b/wpa_supplicant/wpa_supplicant.c
@@ -2090,6 +2090,8 @@ void ibss_mesh_setup_freq(struct wpa_sup
        struct hostapd_freq_params vht_freq;
        int chwidth, seg0, seg1;
        u32 vht_caps = 0;
+       int dfs_enabled = wpa_s->conf->country[0] &&
+               (wpa_s->drv_flags & WPA_DRIVER_FLAGS_RADAR);
 
        freq->freq = ssid->frequency;
 
@@ -2166,8 +2168,11 @@ void ibss_mesh_setup_freq(struct wpa_sup
                return;
 
        /* Check primary channel flags */
-       if (pri_chan->flag & (HOSTAPD_CHAN_DISABLED | HOSTAPD_CHAN_NO_IR))
+       if (pri_chan->flag & HOSTAPD_CHAN_DISABLED)
                return;
+       if (pri_chan->flag & (HOSTAPD_CHAN_RADAR | HOSTAPD_CHAN_NO_IR))
+               if (!dfs_enabled)
+                       return;
 
 #ifdef CONFIG_HT_OVERRIDES
        if (ssid->disable_ht40)
@@ -2193,8 +2198,11 @@ void ibss_mesh_setup_freq(struct wpa_sup
                return;
 
        /* Check secondary channel flags */
-       if (sec_chan->flag & (HOSTAPD_CHAN_DISABLED | HOSTAPD_CHAN_NO_IR))
+       if (sec_chan->flag & HOSTAPD_CHAN_DISABLED)
                return;
+       if (sec_chan->flag & (HOSTAPD_CHAN_RADAR | HOSTAPD_CHAN_NO_IR))
+               if (!dfs_enabled)
+                       return;
 
        freq->channel = pri_chan->chan;
 
@@ -2284,8 +2292,11 @@ void ibss_mesh_setup_freq(struct wpa_sup
                        return;
 
                /* Back to HT configuration if channel not usable */
-               if (chan->flag & (HOSTAPD_CHAN_DISABLED | HOSTAPD_CHAN_NO_IR))
+               if (chan->flag & HOSTAPD_CHAN_DISABLED)
                        return;
+               if (chan->flag & (HOSTAPD_CHAN_RADAR | HOSTAPD_CHAN_NO_IR))
+                       if (!dfs_enabled)
+                               return;
        }
 
        chwidth = VHT_CHANWIDTH_80MHZ;
@@ -2305,10 +2316,11 @@ void ibss_mesh_setup_freq(struct wpa_sup
                                if (!chan)
                                        continue;
 
-                               if (chan->flag & (HOSTAPD_CHAN_DISABLED |
-                                                 HOSTAPD_CHAN_NO_IR |
-                                                 HOSTAPD_CHAN_RADAR))
+                               if (chan->flag & HOSTAPD_CHAN_DISABLED)
                                        continue;
+                               if (chan->flag & (HOSTAPD_CHAN_RADAR | HOSTAPD_CHAN_NO_IR))
+                                       if (!dfs_enabled)
+                                               continue;
 
                                /* Found a suitable second segment for 80+80 */
                                chwidth = VHT_CHANWIDTH_80P80MHZ;